2f760075a7
On some x86_64 hardware the RDRAND instruction returns 64bits of entropy from an on-chip random number generator. RDRAND is not recommended as an exclusive source of entropy for cryptographic applications. https://en.wikipedia.org/wiki/RdRand
34 lines
640 B
C++
34 lines
640 B
C++
/*
|
|
* \brief Utility for reading hardware RNG
|
|
* \date 2019-02-05
|
|
* \author Emery Hemingway
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2019 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__OS__RDRAND_H_
|
|
#define _INCLUDE__OS__RDRAND_H_
|
|
|
|
#include <base/stdint.h>
|
|
#include <base/log.h>
|
|
|
|
namespace Genode { namespace Rdrand {
|
|
|
|
constexpr
|
|
bool supported() { return false; }
|
|
|
|
uint64_t random64()
|
|
{
|
|
error("RDRAND not available on this architecture");
|
|
throw Exception();
|
|
}
|
|
|
|
} }
|
|
|
|
#endif /* _INCLUDE__OS__RDRAND_H_ */
|